From 7d07a68c251080f8f2cfd071b7b3f7d1093a3375 Mon Sep 17 00:00:00 2001 From: Nikolay Aleksandrov Date: Tue, 22 Sep 2020 10:30:20 +0300 Subject: [PATCH] net: bridge: mcast: when igmpv3/mldv2 are enabled lookup (S,G) first, then (*,G) If (S,G) entries are enabled (igmpv3/mldv2) then look them up first. If there isn't a present (S,G) entry then try to find (*,G). Signed-off-by: Nikolay Aleksandrov Signed-off-by: David S. Miller --- net/bridge/br_multicast.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c index e1fb822b9ddb..4fd690bc848f 100644 --- a/net/bridge/br_multicast.c +++ b/net/bridge/br_multicast.c @@ -127,10 +127,28 @@ struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, switch (skb->protocol) { case htons(ETH_P_IP): ip.dst.ip4 = ip_hdr(skb)->daddr; + if (br->multicast_igmp_version == 3) { + struct net_bridge_mdb_entry *mdb; + + ip.src.ip4 = ip_hdr(skb)->saddr; + mdb = br_mdb_ip_get_rcu(br, &ip); + if (mdb) + return mdb; + ip.src.ip4 = 0; + } break; #if IS_ENABLED(CONFIG_IPV6) case htons(ETH_P_IPV6): ip.dst.ip6 = ipv6_hdr(skb)->daddr; + if (br->multicast_mld_version == 2) { + struct net_bridge_mdb_entry *mdb; + + ip.src.ip6 = ipv6_hdr(skb)->saddr; + mdb = br_mdb_ip_get_rcu(br, &ip); + if (mdb) + return mdb; + memset(&ip.src.ip6, 0, sizeof(ip.src.ip6)); + } break; #endif default: